Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars

Details Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars

2005-02-07

arxiv.org/abs/astro-ph/0502138v2

Astron.Astrophys. 438 (2005) 365-376

Astronomy and Astrophysics

Astrophysics

13 pages, 19 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20052831

The excitation of internal gravity waves by penetrative convective plumes is investigated using 2-D direct simulations of compressible convection. The wave generation is quantitatively studied from the linear response of the radiative zone to the plumes penetration, using projections onto the g-modes solutions of the associated linear eigenvalue problem for the perturbations. This allows an accurate determination of both the spectrum and amplitudes of the stochastically excited modes. Using time-frequency diagrams of the mode amplitudes, we then show that the lifetime of a mode is around twice its period and that during times of significant excitation up to 40% of the total kinetic energy may be contained into g-modes.

Affiliated with

Also associated with

No associations

Rating

Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrum and amplitudes of internal gravity waves excited by penetrative convection in solar-type stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-128810